[Community Puzzle] Futoshiki Solver

https://www.codingame.com/training/hard/futoshiki-solver

Send your feedback or ask for help here!

Created by @Sundiver,validated by @TBali,@IAmNoob and @lhm.
If you have any issues, feel free to ping them.

Found that test case “4x4” can have these two solutions:
2134
1423
3241
4312

4231
1324
2143
3412

Are both of them valid?
if YES, the statement did not mention how to resolve a tie like this.
Or, the puzzle should have been designed to avoid having multi-solutions and state it in statement…
I have not thoroughly tested other test cases / validators. Would the author or approvers pls recheck?